Acquisitions	3 Months Ended
Apr. 01, 2018
Acquisitions	D. ACQUISITIONS Energid Technologies Corporation On February 26, 2018, Teradyne acquired all the issued and outstanding shares of Energid Technologies Corporation (“Energid”) for a total preliminary purchase price of approximately $27.6 million. Energid’s technology enables and simplifies the programming of complex robotic motions used in a wide variety of end markets, ranging from heavy industry to healthcare; utilizing both traditional robots and collaborative robots. The Energid acquisition was accounted for as a business combination and, accordingly, Energid’s results have been included in Teradyne’s Industrial Automation segment from the date of acquisition. As of the acquisition date, Teradyne’s preliminary purchase price allocation was goodwill of $15.7 million, acquired intangible assets of $10.9 million with an average estimated useful life of 6.1 years, and $1.0 million of net tangible assets. The acquisition was not material to our condensed consolidated financial statements.

D. ACQUISITIONS

Energid Technologies Corporation

On February 26, 2018, Teradyne acquired all the issued and outstanding shares of Energid Technologies Corporation (“Energid”) for a total preliminary purchase price of approximately $27.6 million. Energid’s technology enables and simplifies the programming of complex robotic motions used in a wide variety of end markets, ranging from heavy industry to healthcare; utilizing both traditional robots and collaborative robots. The Energid acquisition was accounted for as a business combination and, accordingly, Energid’s results have been included in Teradyne’s Industrial Automation segment from the date of acquisition. As of the acquisition date, Teradyne’s preliminary purchase price allocation was goodwill of $15.7 million, acquired intangible assets of $10.9 million with an average estimated useful life of 6.1 years, and $1.0 million of net tangible assets. The acquisition was not material to our condensed consolidated financial statements.